1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/types.h>
32 #include <sys/prctl.h>
33 #include <sys/mount.h>
35 #ifdef HAVE_VALGRIND_VALGRIND_H
36 #include <valgrind/valgrind.h>
42 #include "sd-daemon.h"
43 #include "sd-messages.h"
47 #include "load-fragment.h"
50 #include "conf-parser.h"
57 #include "architecture.h"
59 #include "path-util.h"
60 #include "switch-root.h"
61 #include "capability.h"
66 #include "dbus-manager.h"
67 #include "bus-error.h"
70 #include "mount-setup.h"
71 #include "loopback-setup.h"
72 #include "hostname-setup.h"
73 #include "machine-id-setup.h"
74 #include "selinux-setup.h"
75 #include "ima-setup.h"
76 #include "smack-setup.h"
78 #include "kmod-setup.h"
86 ACTION_DUMP_CONFIGURATION_ITEMS,
88 } arg_action = ACTION_RUN;
89 static char *arg_default_unit = NULL;
90 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
91 static bool arg_dump_core = true;
92 static bool arg_crash_shell = false;
93 static int arg_crash_chvt = -1;
94 static bool arg_confirm_spawn = false;
95 static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;
96 static bool arg_switched_root = false;
97 static char ***arg_join_controllers = NULL;
98 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
99 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
100 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
101 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
102 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
103 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
104 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
105 static usec_t arg_runtime_watchdog = 0;
106 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
107 static char **arg_default_environment = NULL;
108 static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {};
109 static uint64_t arg_capability_bounding_set_drop = 0;
110 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
111 static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
112 static usec_t arg_default_cpu_quota_period_usec = 100 * USEC_PER_MSEC;
113 static Set* arg_syscall_archs = NULL;
114 static FILE* arg_serialization = NULL;
115 static bool arg_default_cpu_accounting = false;
116 static bool arg_default_blockio_accounting = false;
117 static bool arg_default_memory_accounting = false;
119 static void nop_handler(int sig) {}
121 noreturn static void crash(int sig) {
124 /* Pass this on immediately, if this is not PID 1 */
126 else if (!arg_dump_core)
127 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
129 struct sigaction sa = {
130 .sa_handler = nop_handler,
131 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
135 /* We want to wait for the core process, hence let's enable SIGCHLD */
136 sigaction(SIGCHLD, &sa, NULL);
140 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
143 struct rlimit rl = {};
145 /* Enable default signal handler for core dump */
147 sa.sa_handler = SIG_DFL;
148 sigaction(sig, &sa, NULL);
150 /* Don't limit the core dump size */
151 rl.rlim_cur = RLIM_INFINITY;
152 rl.rlim_max = RLIM_INFINITY;
153 setrlimit(RLIMIT_CORE, &rl);
155 /* Just to be sure... */
158 /* Raise the signal again */
161 assert_not_reached("We shouldn't be here...");
168 /* Order things nicely. */
169 r = wait_for_terminate(pid, &status);
171 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
172 else if (status.si_code != CLD_DUMPED)
173 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
175 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
180 chvt(arg_crash_chvt);
182 if (arg_crash_shell) {
183 struct sigaction sa = {
184 .sa_handler = SIG_IGN,
185 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
189 log_info("Executing crash shell in 10s...");
192 /* Let the kernel reap children for us */
193 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
197 log_error("Failed to fork off crash shell: %m");
199 make_console_stdio();
200 execl("/bin/sh", "/bin/sh", NULL);
202 log_error("execl() failed: %m");
206 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
209 log_info("Freezing execution.");
213 static void install_crash_handler(void) {
214 struct sigaction sa = {
216 .sa_flags = SA_NODEFER,
219 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
222 static int console_setup(bool do_reset) {
225 /* If we are init, we connect stdin/stdout/stderr to /dev/null
226 * and make sure we don't have a controlling tty. */
233 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
235 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
239 /* We don't want to force text mode.
240 * plymouth may be showing pictures already from initrd. */
241 r = reset_terminal_fd(tty_fd, false);
243 log_error("Failed to reset /dev/console: %s", strerror(-r));
249 static int set_default_unit(const char *u) {
258 free(arg_default_unit);
259 arg_default_unit = c;
264 static int parse_proc_cmdline_item(const char *key, const char *value) {
266 static const char * const rlmap[] = {
267 "emergency", SPECIAL_EMERGENCY_TARGET,
268 "-b", SPECIAL_EMERGENCY_TARGET,
269 "single", SPECIAL_RESCUE_TARGET,
270 "-s", SPECIAL_RESCUE_TARGET,
271 "s", SPECIAL_RESCUE_TARGET,
272 "S", SPECIAL_RESCUE_TARGET,
273 "1", SPECIAL_RESCUE_TARGET,
274 "2", SPECIAL_RUNLEVEL2_TARGET,
275 "3", SPECIAL_RUNLEVEL3_TARGET,
276 "4", SPECIAL_RUNLEVEL4_TARGET,
277 "5", SPECIAL_RUNLEVEL5_TARGET,
283 if (streq(key, "systemd.unit") && value) {
286 return set_default_unit(value);
288 } else if (streq(key, "rd.systemd.unit") && value) {
290 return set_default_unit(value);
292 } else if (streq(key, "systemd.log_target") && value) {
294 if (log_set_target_from_string(value) < 0)
295 log_warning("Failed to parse log target %s. Ignoring.", value);
297 } else if (streq(key, "systemd.log_level") && value) {
299 if (log_set_max_level_from_string(value) < 0)
300 log_warning("Failed to parse log level %s. Ignoring.", value);
302 } else if (streq(key, "systemd.log_color") && value) {
304 if (log_show_color_from_string(value) < 0)
305 log_warning("Failed to parse log color setting %s. Ignoring.", value);
307 } else if (streq(key, "systemd.log_location") && value) {
309 if (log_show_location_from_string(value) < 0)
310 log_warning("Failed to parse log location setting %s. Ignoring.", value);
312 } else if (streq(key, "systemd.dump_core") && value) {
314 r = parse_boolean(value);
316 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
320 } else if (streq(key, "systemd.crash_shell") && value) {
322 r = parse_boolean(value);
324 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
328 } else if (streq(key, "systemd.crash_chvt") && value) {
330 if (safe_atoi(value, &r) < 0)
331 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
335 } else if (streq(key, "systemd.confirm_spawn") && value) {
337 r = parse_boolean(value);
339 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
341 arg_confirm_spawn = r;
343 } else if (streq(key, "systemd.show_status") && value) {
345 r = parse_show_status(value, &arg_show_status);
347 log_warning("Failed to parse show status switch %s. Ignoring.", value);
349 } else if (streq(key, "systemd.default_standard_output") && value) {
351 r = exec_output_from_string(value);
353 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
355 arg_default_std_output = r;
357 } else if (streq(key, "systemd.default_standard_error") && value) {
359 r = exec_output_from_string(value);
361 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
363 arg_default_std_error = r;
365 } else if (streq(key, "systemd.setenv") && value) {
367 if (env_assignment_is_valid(value)) {
370 env = strv_env_set(arg_default_environment, value);
372 arg_default_environment = env;
374 log_warning("Setting environment variable '%s' failed, ignoring: %s", value, strerror(ENOMEM));
376 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
378 } else if (!streq(key, "systemd.restore_state") &&
379 !streq(key, "systemd.gpt_auto") &&
380 (startswith(key, "systemd.") || startswith(key, "rd.systemd."))) {
384 /* Ignore systemd.journald.xyz and friends */
386 if (startswith(c, "rd."))
388 if (startswith(c, "systemd."))
390 if (c[strcspn(c, ".=")] != '.') {
392 log_warning("Unknown kernel switch %s. Ignoring.", key);
394 log_info("Supported kernel switches:\n"
395 "systemd.unit=UNIT Default unit to start\n"
396 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
397 "systemd.dump_core=0|1 Dump core on crash\n"
398 "systemd.crash_shell=0|1 Run shell on crash\n"
399 "systemd.crash_chvt=N Change to VT #N on crash\n"
400 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
401 "systemd.show_status=0|1|auto Show status updates on the console during bootup\n"
402 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
404 "systemd.log_level=LEVEL Log level\n"
405 "systemd.log_color=0|1 Highlight important log messages\n"
406 "systemd.log_location=0|1 Include code location in log messages\n"
407 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
408 " Set default log output for services\n"
409 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
410 " Set default log error output for services\n"
411 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n"
412 "systemd.restore_state=0|1 Restore backlight/rfkill state at boot\n");
415 } else if (streq(key, "quiet") && !value) {
416 if (arg_show_status == _SHOW_STATUS_UNSET)
417 arg_show_status = SHOW_STATUS_AUTO;
419 } else if (streq(key, "debug") && !value) {
420 log_set_max_level(LOG_DEBUG);
421 if (detect_container(NULL) > 0)
422 log_set_target(LOG_TARGET_CONSOLE);
424 } else if (!in_initrd() && !value) {
427 /* SysV compatibility */
428 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
429 if (streq(key, rlmap[i]))
430 return set_default_unit(rlmap[i+1]);
436 #define DEFINE_SETTER(name, func, descr) \
437 static int name(const char *unit, \
438 const char *filename, \
440 const char *section, \
441 unsigned section_line, \
442 const char *lvalue, \
444 const char *rvalue, \
456 log_syntax(unit, LOG_ERR, filename, line, -r, \
457 "Invalid " descr "'%s': %s", \
458 rvalue, strerror(-r)); \
463 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
464 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
465 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
466 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
468 static int config_parse_cpu_affinity2(
470 const char *filename,
473 unsigned section_line,
490 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
495 if (!(t = strndup(w, l)))
498 r = safe_atou(t, &cpu);
502 if (!(c = cpu_set_malloc(&ncpus)))
505 if (r < 0 || cpu >= ncpus) {
506 log_syntax(unit, LOG_ERR, filename, line, -r,
507 "Failed to parse CPU affinity '%s'", rvalue);
512 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
516 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
517 log_warning_unit(unit, "Failed to set CPU affinity: %m");
525 static int config_parse_show_status(
527 const char *filename,
530 unsigned section_line,
538 ShowStatus *b = data;
545 k = parse_show_status(rvalue, b);
547 log_syntax(unit, LOG_ERR, filename, line, -k,
548 "Failed to parse show status setting, ignoring: %s", rvalue);
555 static void strv_free_free(char ***l) {
567 static void free_join_controllers(void) {
568 strv_free_free(arg_join_controllers);
569 arg_join_controllers = NULL;
572 static int config_parse_join_controllers(const char *unit,
573 const char *filename,
576 unsigned section_line,
591 free_join_controllers();
593 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
596 s = strndup(w, length);
600 l = strv_split(s, ",");
605 if (strv_length(l) <= 1) {
610 if (!arg_join_controllers) {
611 arg_join_controllers = new(char**, 2);
612 if (!arg_join_controllers) {
617 arg_join_controllers[0] = l;
618 arg_join_controllers[1] = NULL;
625 t = new0(char**, n+2);
633 for (a = arg_join_controllers; *a; a++) {
635 if (strv_overlap(*a, l)) {
636 if (strv_extend_strv(&l, *a) < 0) {
656 t[n++] = strv_uniq(l);
658 strv_free_free(arg_join_controllers);
659 arg_join_controllers = t;
666 static int parse_config_file(void) {
668 const ConfigTableItem items[] = {
669 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
670 { "Manager", "LogTarget", config_parse_target, 0, NULL },
671 { "Manager", "LogColor", config_parse_color, 0, NULL },
672 { "Manager", "LogLocation", config_parse_location, 0, NULL },
673 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
674 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
675 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
676 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
677 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
678 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
679 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
680 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
681 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
683 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
685 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
686 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
687 { "Manager", "DefaultCPUQuotaPeriodSec", config_parse_sec, 0, &arg_default_cpu_quota_period_usec },
688 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
689 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
690 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
691 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
692 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
693 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
694 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
695 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
696 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
697 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
698 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
699 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
700 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
701 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
702 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
703 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
704 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
705 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
706 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
707 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
708 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
709 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
710 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
711 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
712 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
713 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
714 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
718 _cleanup_fclose_ FILE *f;
722 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
728 log_warning("Failed to open configuration file '%s': %m", fn);
732 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
734 log_warning("Failed to parse configuration file: %s", strerror(-r));
739 static int parse_argv(int argc, char *argv[]) {
742 ARG_LOG_LEVEL = 0x100,
751 ARG_DUMP_CONFIGURATION_ITEMS,
758 ARG_DEFAULT_STD_OUTPUT,
759 ARG_DEFAULT_STD_ERROR
762 static const struct option options[] = {
763 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
764 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
765 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
766 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
767 { "unit", required_argument, NULL, ARG_UNIT },
768 { "system", no_argument, NULL, ARG_SYSTEM },
769 { "user", no_argument, NULL, ARG_USER },
770 { "test", no_argument, NULL, ARG_TEST },
771 { "help", no_argument, NULL, 'h' },
772 { "version", no_argument, NULL, ARG_VERSION },
773 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
774 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
775 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
776 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
777 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
778 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
779 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
780 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
781 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
793 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
798 r = log_set_max_level_from_string(optarg);
800 log_error("Failed to parse log level %s.", optarg);
807 r = log_set_target_from_string(optarg);
809 log_error("Failed to parse log target %s.", optarg);
818 r = log_show_color_from_string(optarg);
820 log_error("Failed to parse log color setting %s.", optarg);
824 log_show_color(true);
828 case ARG_LOG_LOCATION:
830 r = log_show_location_from_string(optarg);
832 log_error("Failed to parse log location setting %s.", optarg);
836 log_show_location(true);
840 case ARG_DEFAULT_STD_OUTPUT:
841 r = exec_output_from_string(optarg);
843 log_error("Failed to parse default standard output setting %s.", optarg);
846 arg_default_std_output = r;
849 case ARG_DEFAULT_STD_ERROR:
850 r = exec_output_from_string(optarg);
852 log_error("Failed to parse default standard error output setting %s.", optarg);
855 arg_default_std_error = r;
860 r = set_default_unit(optarg);
862 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
869 arg_running_as = SYSTEMD_SYSTEM;
873 arg_running_as = SYSTEMD_USER;
877 arg_action = ACTION_TEST;
881 arg_action = ACTION_VERSION;
884 case ARG_DUMP_CONFIGURATION_ITEMS:
885 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
889 r = optarg ? parse_boolean(optarg) : 1;
891 log_error("Failed to parse dump core boolean %s.", optarg);
897 case ARG_CRASH_SHELL:
898 r = optarg ? parse_boolean(optarg) : 1;
900 log_error("Failed to parse crash shell boolean %s.", optarg);
906 case ARG_CONFIRM_SPAWN:
907 r = optarg ? parse_boolean(optarg) : 1;
909 log_error("Failed to parse confirm spawn boolean %s.", optarg);
912 arg_confirm_spawn = r;
915 case ARG_SHOW_STATUS:
917 r = parse_show_status(optarg, &arg_show_status);
919 log_error("Failed to parse show status boolean %s.", optarg);
923 arg_show_status = SHOW_STATUS_YES;
926 case ARG_DESERIALIZE: {
930 r = safe_atoi(optarg, &fd);
931 if (r < 0 || fd < 0) {
932 log_error("Failed to parse deserialize option %s.", optarg);
933 return r < 0 ? r : -EINVAL;
936 fd_cloexec(fd, true);
940 log_error("Failed to open serialization fd: %m");
944 if (arg_serialization)
945 fclose(arg_serialization);
947 arg_serialization = f;
952 case ARG_SWITCHED_ROOT:
953 arg_switched_root = true;
957 arg_action = ACTION_HELP;
961 log_set_max_level(LOG_DEBUG);
967 /* Just to eat away the sysvinit kernel
968 * cmdline args without getopt() error
969 * messages that we'll parse in
970 * parse_proc_cmdline_word() or ignore. */
975 log_error("Unknown option code %c", c);
982 if (optind < argc && getpid() != 1) {
983 /* Hmm, when we aren't run as init system
984 * let's complain about excess arguments */
986 log_error("Excess arguments.");
990 if (detect_container(NULL) > 0) {
993 /* All /proc/cmdline arguments the kernel didn't
994 * understand it passed to us. We're not really
995 * interested in that usually since /proc/cmdline is
996 * more interesting and complete. With one exception:
997 * if we are run in a container /proc/cmdline is not
998 * relevant for the container, hence we rely on argv[]
1001 for (a = argv; a < argv + argc; a++) {
1002 _cleanup_free_ char *w;
1009 value = strchr(w, '=');
1013 r = parse_proc_cmdline_item(w, value);
1015 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1024 static int help(void) {
1026 printf("%s [OPTIONS...]\n\n"
1027 "Starts up and maintains the system or user services.\n\n"
1028 " -h --help Show this help\n"
1029 " --test Determine startup sequence, dump it and exit\n"
1030 " --dump-configuration-items Dump understood unit configuration items\n"
1031 " --unit=UNIT Set default unit\n"
1032 " --system Run a system instance, even if PID != 1\n"
1033 " --user Run a user instance\n"
1034 " --dump-core[=0|1] Dump core on crash\n"
1035 " --crash-shell[=0|1] Run shell on crash\n"
1036 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1037 " --show-status[=0|1] Show status updates on the console during bootup\n"
1038 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1039 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1040 " --log-color[=0|1] Highlight important log messages\n"
1041 " --log-location[=0|1] Include code location in log messages\n"
1042 " --default-standard-output= Set default standard output for services\n"
1043 " --default-standard-error= Set default standard error output for services\n",
1044 program_invocation_short_name);
1049 static int version(void) {
1050 puts(PACKAGE_STRING);
1051 puts(SYSTEMD_FEATURES);
1056 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1065 r = manager_open_serialization(m, &f);
1067 log_error("Failed to create serialization file: %s", strerror(-r));
1071 /* Make sure nothing is really destructed when we shut down */
1073 bus_manager_send_reloading(m, true);
1078 log_error("Failed to allocate fd set: %s", strerror(-r));
1082 r = manager_serialize(m, f, fds, switching_root);
1084 log_error("Failed to serialize state: %s", strerror(-r));
1088 if (fseeko(f, 0, SEEK_SET) < 0) {
1089 log_error("Failed to rewind serialization fd: %m");
1093 r = fd_cloexec(fileno(f), false);
1095 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1099 r = fdset_cloexec(fds, false);
1101 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1119 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1123 assert(saved_rlimit);
1125 /* Save the original RLIMIT_NOFILE so that we can reset it
1126 * later when transitioning from the initrd to the main
1127 * systemd or suchlike. */
1128 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1129 log_error("Reading RLIMIT_NOFILE failed: %m");
1133 /* Make sure forked processes get the default kernel setting */
1134 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1137 rl = newdup(struct rlimit, saved_rlimit, 1);
1141 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1144 /* Bump up the resource limit for ourselves substantially */
1145 nl.rlim_cur = nl.rlim_max = 64*1024;
1146 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1148 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1155 static void test_mtab(void) {
1158 /* Check that /etc/mtab is a symlink */
1160 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1163 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1170 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1171 "This is not supported anymore. "
1172 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1175 static void test_usr(void) {
1177 /* Check that /usr is not a separate fs */
1179 if (dir_is_empty("/usr") <= 0)
1182 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1183 "Some things will probably break (sometimes even silently) in mysterious ways. "
1184 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1187 static void test_cgroups(void) {
1189 if (access("/proc/cgroups", F_OK) >= 0)
1192 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1193 "Systems without control groups are not supported. "
1194 "We will now sleep for 10s, and then continue boot-up. "
1195 "Expect breakage and please do not file bugs. "
1196 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1197 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1202 static int initialize_join_controllers(void) {
1203 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1204 * + "net_prio". We'd like to add "cpuset" to the mix, but
1205 * "cpuset" does't really work for groups with no initialized
1208 arg_join_controllers = new(char**, 3);
1209 if (!arg_join_controllers)
1212 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1213 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1214 arg_join_controllers[2] = NULL;
1216 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1217 free_join_controllers();
1224 static int enforce_syscall_archs(Set *archs) {
1226 scmp_filter_ctx *seccomp;
1231 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1235 SET_FOREACH(id, arg_syscall_archs, i) {
1236 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1240 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1245 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1247 log_error("Failed to unset NO_NEW_PRIVS: %s", strerror(-r));
1251 r = seccomp_load(seccomp);
1253 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1256 seccomp_release(seccomp);
1263 static int status_welcome(void) {
1264 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1267 r = parse_env_file("/etc/os-release", NEWLINE,
1268 "PRETTY_NAME", &pretty_name,
1269 "ANSI_COLOR", &ansi_color,
1272 if (r < 0 && r != -ENOENT)
1273 log_warning("Failed to read /etc/os-release: %s", strerror(-r));
1275 return status_printf(NULL, false, false,
1276 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1277 isempty(ansi_color) ? "1" : ansi_color,
1278 isempty(pretty_name) ? "Linux" : pretty_name);
1281 int main(int argc, char *argv[]) {
1283 int r, retval = EXIT_FAILURE;
1284 usec_t before_startup, after_startup;
1285 char timespan[FORMAT_TIMESPAN_MAX];
1287 bool reexecute = false;
1288 const char *shutdown_verb = NULL;
1289 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1290 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1291 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1292 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1293 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1294 static char systemd[] = "systemd";
1295 bool skip_setup = false;
1297 bool loaded_policy = false;
1298 bool arm_reboot_watchdog = false;
1299 bool queue_default_job = false;
1300 char *switch_root_dir = NULL, *switch_root_init = NULL;
1301 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1303 #ifdef HAVE_SYSV_COMPAT
1304 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1305 /* This is compatibility support for SysV, where
1306 * calling init as a user is identical to telinit. */
1309 execv(SYSTEMCTL_BINARY_PATH, argv);
1310 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1315 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1316 dual_timestamp_get(&userspace_timestamp);
1318 /* Determine if this is a reexecution or normal bootup. We do
1319 * the full command line parsing much later, so let's just
1320 * have a quick peek here. */
1321 if (strv_find(argv+1, "--deserialize"))
1324 /* If we have switched root, do all the special setup
1326 if (strv_find(argv+1, "--switched-root"))
1329 /* If we get started via the /sbin/init symlink then we are
1330 called 'init'. After a subsequent reexecution we are then
1331 called 'systemd'. That is confusing, hence let's call us
1332 systemd right-away. */
1333 program_invocation_short_name = systemd;
1334 prctl(PR_SET_NAME, systemd);
1339 log_show_color(isatty(STDERR_FILENO) > 0);
1341 /* Disable the umask logic */
1345 if (getpid() == 1 && detect_container(NULL) <= 0) {
1347 /* Running outside of a container as PID 1 */
1348 arg_running_as = SYSTEMD_SYSTEM;
1350 log_set_target(LOG_TARGET_KMSG);
1354 initrd_timestamp = userspace_timestamp;
1357 mount_setup_early();
1358 dual_timestamp_get(&security_start_timestamp);
1359 if (selinux_setup(&loaded_policy) < 0)
1361 if (ima_setup() < 0)
1363 if (smack_setup(&loaded_policy) < 0)
1365 dual_timestamp_get(&security_finish_timestamp);
1368 if (label_init(NULL) < 0)
1372 if (hwclock_is_localtime() > 0) {
1375 /* The first-time call to settimeofday() does a time warp in the kernel */
1376 r = hwclock_set_timezone(&min);
1378 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1380 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1381 } else if (!in_initrd()) {
1383 * Do dummy first-time call to seal the kernel's time warp magic
1385 * Do not call this this from inside the initrd. The initrd might not
1386 * carry /etc/adjtime with LOCAL, but the real system could be set up
1387 * that way. In such case, we need to delay the time-warp or the sealing
1388 * until we reach the real system.
1390 hwclock_reset_timezone();
1392 /* Tell the kernel our timezone */
1393 r = hwclock_set_timezone(NULL);
1395 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1399 /* Set the default for later on, but don't actually
1400 * open the logs like this for now. Note that if we
1401 * are transitioning from the initrd there might still
1402 * be journal fd open, and we shouldn't attempt
1403 * opening that before we parsed /proc/cmdline which
1404 * might redirect output elsewhere. */
1405 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1407 } else if (getpid() == 1) {
1408 /* Running inside a container, as PID 1 */
1409 arg_running_as = SYSTEMD_SYSTEM;
1410 log_set_target(LOG_TARGET_CONSOLE);
1411 log_close_console(); /* force reopen of /dev/console */
1414 /* For the later on, see above... */
1415 log_set_target(LOG_TARGET_JOURNAL);
1417 /* clear the kernel timestamp,
1418 * because we are in a container */
1419 kernel_timestamp.monotonic = 0ULL;
1420 kernel_timestamp.realtime = 0ULL;
1423 /* Running as user instance */
1424 arg_running_as = SYSTEMD_USER;
1425 log_set_target(LOG_TARGET_AUTO);
1428 /* clear the kernel timestamp,
1429 * because we are not PID 1 */
1430 kernel_timestamp.monotonic = 0ULL;
1431 kernel_timestamp.realtime = 0ULL;
1434 /* Initialize default unit */
1435 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1437 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1441 r = initialize_join_controllers();
1445 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1446 * /proc/$PID/fd is available. */
1447 if (getpid() == 1) {
1448 r = mount_setup(loaded_policy);
1453 /* Reset all signal handlers. */
1454 assert_se(reset_all_signal_handlers() == 0);
1456 ignore_signals(SIGNALS_IGNORE, -1);
1458 if (parse_config_file() < 0)
1461 if (arg_running_as == SYSTEMD_SYSTEM)
1462 if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
1465 log_parse_environment();
1467 if (parse_argv(argc, argv) < 0)
1470 if (arg_action == ACTION_TEST &&
1472 log_error("Don't run test mode as root.");
1476 if (arg_running_as == SYSTEMD_USER &&
1477 arg_action == ACTION_RUN &&
1479 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1483 if (arg_running_as == SYSTEMD_SYSTEM &&
1484 arg_action == ACTION_RUN &&
1485 running_in_chroot() > 0) {
1486 log_error("Cannot be run in a chroot() environment.");
1490 if (arg_action == ACTION_HELP) {
1493 } else if (arg_action == ACTION_VERSION) {
1496 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1497 unit_dump_config_items(stdout);
1498 retval = EXIT_SUCCESS;
1500 } else if (arg_action == ACTION_DONE) {
1501 retval = EXIT_SUCCESS;
1505 if (arg_running_as == SYSTEMD_USER &&
1506 !getenv("XDG_RUNTIME_DIR")) {
1507 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1511 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1513 /* Close logging fds, in order not to confuse fdset below */
1516 /* Remember open file descriptors for later deserialization */
1517 r = fdset_new_fill(&fds);
1519 log_error("Failed to allocate fd set: %s", strerror(-r));
1522 fdset_cloexec(fds, true);
1524 if (arg_serialization)
1525 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1527 if (arg_running_as == SYSTEMD_SYSTEM)
1528 /* Become a session leader if we aren't one yet. */
1531 /* Move out of the way, so that we won't block unmounts */
1532 assert_se(chdir("/") == 0);
1534 /* Reset the console, but only if this is really init and we
1535 * are freshly booted */
1536 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1537 console_setup(getpid() == 1 && !skip_setup);
1539 /* Open the logging devices, if possible and necessary */
1542 if (arg_show_status == _SHOW_STATUS_UNSET)
1543 arg_show_status = SHOW_STATUS_YES;
1545 /* Make sure we leave a core dump without panicing the
1547 if (getpid() == 1) {
1548 install_crash_handler();
1550 r = mount_cgroup_controllers(arg_join_controllers);
1555 if (arg_running_as == SYSTEMD_SYSTEM) {
1556 const char *virtualization = NULL;
1558 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1560 detect_virtualization(&virtualization);
1562 log_info("Detected virtualization '%s'.", virtualization);
1564 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1567 log_info("Running in initial RAM disk.");
1570 _cleanup_free_ char *t = uid_to_name(getuid());
1571 log_debug(PACKAGE_STRING " running in user mode for user "PID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1575 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1576 if (arg_show_status > 0 || plymouth_running())
1580 if (detect_container(NULL) <= 0)
1584 machine_id_setup("");
1592 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1593 watchdog_set_timeout(&arg_runtime_watchdog);
1595 if (arg_timer_slack_nsec != (nsec_t) -1)
1596 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1597 log_error("Failed to adjust timer slack: %m");
1599 if (arg_capability_bounding_set_drop) {
1600 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1602 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1605 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1607 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1612 if (arg_syscall_archs) {
1613 r = enforce_syscall_archs(arg_syscall_archs);
1618 if (arg_running_as == SYSTEMD_USER) {
1619 /* Become reaper of our children */
1620 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1621 log_warning("Failed to make us a subreaper: %m");
1622 if (errno == EINVAL)
1623 log_info("Perhaps the kernel version is too old (< 3.4?)");
1627 if (arg_running_as == SYSTEMD_SYSTEM)
1628 bump_rlimit_nofile(&saved_rlimit_nofile);
1630 r = manager_new(arg_running_as, &m);
1632 log_error("Failed to allocate manager object: %s", strerror(-r));
1636 m->confirm_spawn = arg_confirm_spawn;
1637 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
1638 m->default_cpu_quota_period_usec = arg_default_cpu_quota_period_usec;
1639 m->default_std_output = arg_default_std_output;
1640 m->default_std_error = arg_default_std_error;
1641 m->default_restart_usec = arg_default_restart_usec;
1642 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1643 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1644 m->default_start_limit_interval = arg_default_start_limit_interval;
1645 m->default_start_limit_burst = arg_default_start_limit_burst;
1646 m->default_cpu_accounting = arg_default_cpu_accounting;
1647 m->default_blockio_accounting = arg_default_blockio_accounting;
1648 m->default_memory_accounting = arg_default_memory_accounting;
1649 m->runtime_watchdog = arg_runtime_watchdog;
1650 m->shutdown_watchdog = arg_shutdown_watchdog;
1651 m->userspace_timestamp = userspace_timestamp;
1652 m->kernel_timestamp = kernel_timestamp;
1653 m->initrd_timestamp = initrd_timestamp;
1654 m->security_start_timestamp = security_start_timestamp;
1655 m->security_finish_timestamp = security_finish_timestamp;
1657 manager_set_default_rlimits(m, arg_default_rlimit);
1658 manager_environment_add(m, NULL, arg_default_environment);
1659 manager_set_show_status(m, arg_show_status);
1661 /* Remember whether we should queue the default job */
1662 queue_default_job = !arg_serialization || arg_switched_root;
1664 before_startup = now(CLOCK_MONOTONIC);
1666 r = manager_startup(m, arg_serialization, fds);
1668 log_error("Failed to fully start up daemon: %s", strerror(-r));
1670 /* This will close all file descriptors that were opened, but
1671 * not claimed by any unit. */
1675 if (arg_serialization) {
1676 fclose(arg_serialization);
1677 arg_serialization = NULL;
1680 if (queue_default_job) {
1681 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1682 Unit *target = NULL;
1683 Job *default_unit_job;
1685 log_debug("Activating default unit: %s", arg_default_unit);
1687 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1689 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1690 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1691 log_error("Failed to load default target: %s", strerror(-target->load_error));
1692 else if (target->load_state == UNIT_MASKED)
1693 log_error("Default target masked.");
1695 if (!target || target->load_state != UNIT_LOADED) {
1696 log_info("Trying to load rescue target...");
1698 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1700 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1702 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1703 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1705 } else if (target->load_state == UNIT_MASKED) {
1706 log_error("Rescue target masked.");
1711 assert(target->load_state == UNIT_LOADED);
1713 if (arg_action == ACTION_TEST) {
1714 printf("-> By units:\n");
1715 manager_dump_units(m, stdout, "\t");
1718 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1720 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1722 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1724 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1728 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1732 m->default_unit_job_id = default_unit_job->id;
1734 after_startup = now(CLOCK_MONOTONIC);
1735 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1736 "Loaded units and determined initial transaction in %s.",
1737 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1739 if (arg_action == ACTION_TEST) {
1740 printf("-> By jobs:\n");
1741 manager_dump_jobs(m, stdout, "\t");
1742 retval = EXIT_SUCCESS;
1748 r = manager_loop(m);
1750 log_error("Failed to run mainloop: %s", strerror(-r));
1754 switch (m->exit_code) {
1757 retval = EXIT_SUCCESS;
1761 case MANAGER_RELOAD:
1762 log_info("Reloading.");
1763 r = manager_reload(m);
1765 log_error("Failed to reload: %s", strerror(-r));
1768 case MANAGER_REEXECUTE:
1770 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1774 log_notice("Reexecuting.");
1777 case MANAGER_SWITCH_ROOT:
1778 /* Steal the switch root parameters */
1779 switch_root_dir = m->switch_root;
1780 switch_root_init = m->switch_root_init;
1781 m->switch_root = m->switch_root_init = NULL;
1783 if (!switch_root_init)
1784 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1788 log_notice("Switching root.");
1791 case MANAGER_REBOOT:
1792 case MANAGER_POWEROFF:
1794 case MANAGER_KEXEC: {
1795 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1796 [MANAGER_REBOOT] = "reboot",
1797 [MANAGER_POWEROFF] = "poweroff",
1798 [MANAGER_HALT] = "halt",
1799 [MANAGER_KEXEC] = "kexec"
1802 assert_se(shutdown_verb = table[m->exit_code]);
1803 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1805 log_notice("Shutting down.");
1810 assert_not_reached("Unknown exit code.");
1820 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1821 free(arg_default_rlimit[j]);
1822 arg_default_rlimit[j] = NULL;
1825 free(arg_default_unit);
1826 arg_default_unit = NULL;
1828 free_join_controllers();
1830 strv_free(arg_default_environment);
1831 arg_default_environment = NULL;
1833 set_free(arg_syscall_archs);
1834 arg_syscall_archs = NULL;
1840 unsigned i, args_size;
1842 /* Close and disarm the watchdog, so that the new
1843 * instance can reinitialize it, but doesn't get
1844 * rebooted while we do that */
1845 watchdog_close(true);
1847 /* Reset the RLIMIT_NOFILE to the kernel default, so
1848 * that the new systemd can pass the kernel default to
1849 * its child processes */
1850 if (saved_rlimit_nofile.rlim_cur > 0)
1851 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1853 if (switch_root_dir) {
1854 /* Kill all remaining processes from the
1855 * initrd, but don't wait for them, so that we
1856 * can handle the SIGCHLD for them after
1858 broadcast_signal(SIGTERM, false, true);
1860 /* And switch root */
1861 r = switch_root(switch_root_dir);
1863 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1866 args_size = MAX(6, argc+1);
1867 args = newa(const char*, args_size);
1869 if (!switch_root_init) {
1872 /* First try to spawn ourselves with the right
1873 * path, and with full serialization. We do
1874 * this only if the user didn't specify an
1875 * explicit init to spawn. */
1877 assert(arg_serialization);
1880 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1884 args[i++] = SYSTEMD_BINARY_PATH;
1885 if (switch_root_dir)
1886 args[i++] = "--switched-root";
1887 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1888 args[i++] = "--deserialize";
1892 /* do not pass along the environment we inherit from the kernel or initrd */
1893 if (switch_root_dir)
1896 assert(i <= args_size);
1897 execv(args[0], (char* const*) args);
1900 /* Try the fallback, if there is any, without any
1901 * serialization. We pass the original argv[] and
1902 * envp[]. (Well, modulo the ordering changes due to
1903 * getopt() in argv[], and some cleanups in envp[],
1904 * but let's hope that doesn't matter.) */
1906 if (arg_serialization) {
1907 fclose(arg_serialization);
1908 arg_serialization = NULL;
1916 /* Reopen the console */
1917 make_console_stdio();
1919 for (j = 1, i = 1; j < (unsigned) argc; j++)
1920 args[i++] = argv[j];
1922 assert(i <= args_size);
1924 if (switch_root_init) {
1925 args[0] = switch_root_init;
1926 execv(args[0], (char* const*) args);
1927 log_warning("Failed to execute configured init, trying fallback: %m");
1930 args[0] = "/sbin/init";
1931 execv(args[0], (char* const*) args);
1933 if (errno == ENOENT) {
1934 log_warning("No /sbin/init, trying fallback");
1936 args[0] = "/bin/sh";
1938 execv(args[0], (char* const*) args);
1939 log_error("Failed to execute /bin/sh, giving up: %m");
1941 log_warning("Failed to execute /sbin/init, giving up: %m");
1944 if (arg_serialization) {
1945 fclose(arg_serialization);
1946 arg_serialization = NULL;
1954 #ifdef HAVE_VALGRIND_VALGRIND_H
1955 /* If we are PID 1 and running under valgrind, then let's exit
1956 * here explicitly. valgrind will only generate nice output on
1957 * exit(), not on exec(), hence let's do the former not the
1959 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1963 if (shutdown_verb) {
1964 char log_level[DECIMAL_STR_MAX(int) + 1];
1965 const char* command_line[9] = {
1966 SYSTEMD_SHUTDOWN_BINARY_PATH,
1968 "--log-level", log_level,
1972 _cleanup_strv_free_ char **env_block = NULL;
1974 assert(command_line[pos] == NULL);
1975 env_block = strv_copy(environ);
1977 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
1979 switch (log_get_target()) {
1980 case LOG_TARGET_KMSG:
1981 case LOG_TARGET_JOURNAL_OR_KMSG:
1982 case LOG_TARGET_SYSLOG_OR_KMSG:
1983 command_line[pos++] = "kmsg";
1986 case LOG_TARGET_CONSOLE:
1988 command_line[pos++] = "console";
1992 if (log_get_show_color())
1993 command_line[pos++] = "--log-color";
1995 if (log_get_show_location())
1996 command_line[pos++] = "--log-location";
1998 assert(pos < ELEMENTSOF(command_line));
2000 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2003 /* If we reboot let's set the shutdown
2004 * watchdog and tell the shutdown binary to
2005 * repeatedly ping it */
2006 watchdog_set_timeout(&arg_shutdown_watchdog);
2007 watchdog_close(false);
2009 /* Tell the binary how often to ping, ignore failure */
2010 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2011 strv_push(&env_block, e);
2013 watchdog_close(true);
2015 /* Avoid the creation of new processes forked by the
2016 * kernel; at this point, we will not listen to the
2018 if (detect_container(NULL) <= 0)
2019 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2021 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2022 log_error("Failed to execute shutdown binary, %s: %m",
2023 getpid() == 1 ? "freezing" : "quitting");